/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/DynamicMeshTriangleAttribute.h
virtual [TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [FDynamicMeshAttributeChangeBase](API\Runtime\GeometryCore\DynamicMesh\FDynamicMeshAttributeChangeBase) > NewBlankChange() const